Verse:
C
Knock Knock Knock
                    Em         Em7
My house is always open
C
Why shield myself with
                       Em      Em7 
Quills and feints and lies
C
I can put on quite a show
                      Em      Em7  
But inside I'm broken
C
Porcupine
Em         Em7
Porcupine
C               Em         Em7    
Here it comes again
                 C
Here it comes again
               Em           Em7 
Here it comes again
(same as above till)
Please don't stop
You'll get past my defenses
My body armour's plated over time
I got away with it once
But I soon became addicted
                   Am
Porcupine porcupine
Chorous:
G                     C
At the edge of the world
                         G
Leave my things by the door
                  Am
I surrender control
Fmaj7              G
Diving into the fall
On my back's the weight
Of my offences
You're a skunk and
I'm a porcupine
Our weaponary's evolved
From the heightened senses
Porcupine
Porcupine
At the edge of the world
Leave my things by the door
I surrender control
Diving into the fall
Should be right, corrections and comments welcome!